Definify.com
Webster 1913 Edition
Octagon
Oc′ta-gon
,Noun.
[Gr. [GREEK] eight-cornered;
ὀκτα-
(for ὀκτώ
eight) + [GREEK] an angle: cf. F. cctogone
.] 1.
(Geom.)
A plane figure of eight sides and eight angles.
2.
Any structure (as a fortification) or place with eight sides or angles.
Regular octagon
, one in which the sides are all equal, and the angles also are all equal.
Webster 1828 Edition
Octagon
OC'TAGON
,Noun.
1.
In geometry, a figure of eight sides and eight angles. When the sides and angles are equal, it is a regular octagon which may be inscribed in a circle.2.
In fortification, a place with eight bastions.